H3C S7500 Series Ethernet Switches Command Manual

Table Of Contents
Command Manual – Routing Protocol
H3C S7500 Series Ethernet Switches Chapter 3 OSPF Configuration Commands
3-35
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] ospf 1
[H3C-ospf-1] area 6
[H3C-ospf-1-area-0.0.0.6] network 10.110.36.0 0.0.0.255
3.1.29 nssa
Syntax
nssa [ default-route-advertise | no-import-route | no-summary ]*
undo nssa
View
OSPF area view
Parameters
default-route-advertise: Imports the default route to the NSSA area.
no-import-route: Specifies not to import route to the NSSA area.
no-summary: An ABR is disabled from transmitting summary_net LSAs to the NSSA
area.
Description
Use the nssa command to configure an OSPF area as an NSSA area.
Use the undo nssa command to cancel the function.
By default, no NSSA area is configured.
For all the routers connected to the NSSA area, the nssa command must be used to
configure the area as the NSSA attribute.
The default-route-advertise keyword is used to generate the default type-7 LSA.
Whether or not the route 0.0.0.0 exists in the routing table on the ABR, the type-7 LSA
default route will always be generated. The type-7 LSA default route is generated only
when the route 0.0.0.0 exists in the routing table on the ASBR.
On the ASBR, if the no-import-route keyword is provided, the external route imported
by OSPF with the import-route command will not be advertised to NSSA area.
Examples
# Configure area 1 as NSSA area.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] ospf 1
[H3C-ospf-1] area 1